they are filled with concrete and rebar.... the worse areas are double walled... plus there is cameras everywhere
what i wonder, what is stopping them from digging under it.
they are filled with concrete and rebar.... the worse areas are double walled... plus there is cameras everywhere
https://youtu.be/REgjKxK6oNI
what i wonder, what is stopping them from digging under it.
I remembered something about seismic sensors. I don't know if they use them or not though
I remembered something about seismic sensors. I don't know if they use them or not though
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